I got a great early Christmas present from my wife - it's a pen made from two .308 Winchester cases. Talk about a "tactical" pen! The best part is that part of the price from each pen sold goes directly to the Special Operations Warrior Foundation, which gives scholarships to kids whose parents have died on Special Ops missions.
For more information, check out "Junior's Bullet Pens." I was surprised how reasonably priced they are - on sale for just $17! They even have wooden pens in all kinds of hardwoods if brass really isn't your thing. If you don't need a pen, you can still visit the SOWF website and make a donation to them if you'd like to. My boss, Pat, has been supporting them for years and speaks very highly of the charity.